NCP1587E
http://onsemi.com
13
Figure 15. Demo Board PCB Layout
Vin
V
bst
GND
OUTP
U
TG
BG
SWITCH_NODE
VCC
GND
Note : gating
length s
Note : gating
length sho
GND
COMP
FB
GND
SO8FLIPAKDPAK IPAK SO8FLDPAK
IPAK SO8FLDPAK IPAK SO8FLDPAK
DUAL PLACEMENT SITE DUAL PLACEMENT SITE DUAL PLACEMENT SITE
DUAL PLACEMENT SITE DUAL PLACEMENT SITE DUAL PLACEMENT SITE
1
SWITCH_NODE
TG
VOUT
BST
BG
Vin
COMP
Vbst
VCC
FB
GND
VOUT
Q12
DNP
D
G
S
C9
1uF
C22
10uF
TP111
C20
DNP
+
C4
1500uF
C19
10uF
TP112
TP97
Rc1
DNP
R5
5.11
R8
DNP
Rc
604
R7
0
TP7
C23
10uF
R4
DNP
Q4
NTD4815
C8
1uF
U1
NCP1587
17
6 4
8
3
2
5
BSTCOMP
FBBG
PHASE
GND
TG
VCC
TP98
R6
0
+
C12
1800uF
Cp1
DNP
TP109
R639
0
Q11
DNP
D
G
S
TP9
+
C24
DNP
C11
0.1uF
Cp
100pF
Q7
NTD4806
MH1
TP110
TP105
+
C13
1800uF
Q2
NTD4815
C25
10uF
TP95
Q3
NTD4815
+
C5
DNP
TP106
TP100
Q8
NTD4806
C16
10uF
Q9
DNP
D
G
S
TP94
C21
DNP
TP104
Cc1
DNP
CC
0.1uF
Q5
NTD4806
TP107
TP1
R90
MH4
TP102
TP93
TP113
Q6
NTD4806
Q1
NTD4815
TP96
TP108
TP103
TP20
L11uH
MH3
C17
10uF
TP2
+
C15
DNP
R3
1.02K
TP99
C18
10uF
R1
10
CR1
BAS1
16LT1
13
MH2
Q10
DNP
D
G
S
R2
1.02K
L2DNP
TP101
NCP1587E
http://onsemi.com
14
Bill of Materials
Item Number Part Reference Value Quantity MFG
1 C4
1500 mF
1 PANASONIC
2 C5 DNP 1 -
3 C8,C9
1 mF
2 TAIYO YUDEN
4 C11
0.1 mF
1 AVX
5 C12,C13
1800 mF
2 PANASONIC
6 C15,C24 DNP 2 -
7 C16,C17,C18,C19,C22,C23,C25
10 mF
7 PANASONIC
8 C20,CC1,CP1 DNP 3 -
9 C21 DNP 1 -
10 CC
0.1 mF
1 TDK
11 CR1 BAS116LT1 1 ON SEMICONDUCTOR
12 CP 100 pF 1 PANASONIC
13 J9 20PIN 2ROW 1 MOLEX
14 J23 5PIN 1 PASTERNACK
ENTERPRISES
15 L1
1 mH
1 PANASONIC
16 L2 DNP 1 -
17 Q1,Q2 NTD4815 2 ON SEMICONDUCTOR
18 Q3,Q4 NTD4815 2 ON SEMICONDUCTOR
19 Q5,Q6 NTD4806 2 ON SEMICONDUCTOR
20 Q7,Q8 NTD4806 2 ON SEMICONDUCTOR
21 Q9,Q10,Q11,Q12 DNP 4 -
22 Q17,Q18,Q19,Q20,Q21,Q22,Q23,Q24,Q25,Q26,
Q27,Q28,Q29,Q30,Q31,Q32,Q33,Q34,Q35,Q36,
Q37,Q38,Q39,Q40
NTHS5404T1 24 ON SEMICONDUCTOR
23 R1 10 1 PANASONIC
24 R2,R3 1.02 K 2 DALE
25 R4,RC1 DNP 2 -
26 R5 5.11 1 DALE
27 R6,R7,R639 0 3 PANASONIC
28 R8 DNP 1 -
29 R9 0 1 DALE
30 R551,R552,R553,R569,R570,R571,R584,R585,
R586,R599,R600,R601,R608,R609,R610,R617,
R618,R619,R626,R627,R628,R635,R636,R637
100 K 24 DALE
31 R602,R603,R604,R605,R606,R607,R611,R612,
R613,R614,R615,R616,R620,R621,R622,R623,
R624,R625,R629,R630,R631,R632,R633,R634
0.56 24 PANASONIC
32 R638 49.9 1 DALE
33 RC 604 1 DALE
34 TP97,TP98,TP99,TP100,TP101,TP102,TP103,
TP104,TP105,TP106,TP107,TP108,TP109,
TP110,TP111,TP112
TP 16 KEYSTONE
35 U1 NCP1587E 1 ON SEMICONDUCTOR
NCP1587E
http://onsemi.com
15
Figure 16. Gate Waveforms 20 A Load Sustaining
Figure 17. Over Current Protection (12.4 A DC Trip)
Figure 18. Start-up Sequence Figure 19. Transient Response 0-10 A Load Step
NCP1587 Efficiency
60
62
64
66
68
70
72
74
76
78
80
82
84
86
88
90
0246810121416
Load Current (A)
Efficiency (%)
Figure 20. Efficiency vs. Load Current

NCP1587EDR2G

Mfr. #:
Manufacturer:
ON Semiconductor
Description:
Switching Controllers BUCK CONTROLLER
Lifecycle:
New from this manufacturer.
Delivery:
DHL FedEx Ups TNT EMS
Payment:
T/T Paypal Visa MoneyGram Western Union

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